Appendix L
Maintenance Level Guidelines
3. Within a few days after spraying. Its use in natural area restoration is usually restricted to use to prevent woody plants from resprouting after they are cut. The cut stem (stump) is treated with a concentrated (20%) solution of glyphosate. The chemical moves to the roots and kills the root system. With care, the chemical is confined to the cut stem only, and nearby vegetation is not affected. 4. At approved concentrations, sethoxydim is active only against grasses; neither sedges nor broadleaf plants are affected. It has been found effective in the control of reed canary grass in wetland situations. 5. Triclopyr is widely used for the control of woody vegetation. Like glyphosate, it can be used to treat cut stems to prevent resprouting. One chemical form, Garlon 4, is soluble in oil and can be used to control woody vegetation by treatment of a zone of bark along the lower part of the trunk. The hydrophobic Garlon moves through the bark to the phloem and is translocated to the roots. This basal bark treatment is effective even in the winter. After treatment, the tree or shrub does not leaf out the following spring. Eventually the roots die and the plant topples to the ground. 6. Clopyralid is unusually effective against plants of the legume and sunflower (Composite) family. It is used for the control of legumes such as crown vetch and black locust, and of composites such as Canada thistle and spotted knapweed. Although it is active against other plant species, the effective concentration required is much higher. 7. Fosamine is used for control of woody plants such as brush and brambles in non- cropland areas. It is applied as a foliage treatment during the growing season. Treated woody plants remain green for the remainder of the growing season but fail to leaf out the next spring. 8. Imazapic will control most broadleaf weeds as well as cool-season grasses such as smooth brome and quack grass. 3.2 Method – Mowing: A. During the Growing Season: mow all native seeded areas to a height of 8-12” after vegetation in said areas reach a height of 24” and before non-native species go to seed during the first two growing seasons after planting. 1. Mowing will eliminate annual weed species such as ragweed, foxtail, and Russian thistle if implemented before seed dispersal. 2. A tractor mounted “flail” mower may be used for larger areas. Hand held weed whips may be used in smaller areas. Standard lawn tractors or mowers are not allowed unless they can be adjusted to the minimum height. 3. Remove clippings from the site if cut vegetation creates a solid mat of vegetation on the surface of the ground. Clumps exceeding one square foot and ½” in depth must be spread uniformly or removed from the site.
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Naperville Park District | 2023 MASTER PLAN
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